91666836 has 48 divisors (see below), whose sum is σ = 238228480. Its totient is φ = 30481920.

The previous prime is 91666829. The next prime is 91666859. The reversal of 91666836 is 63866619.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 91666791 and 91666800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61581 + ... + 63051.

Almost surely, 2^91666836 is an apocalyptic number.

It is an amenable number.

91666836 is an abundant number, since it is smaller than the sum of its proper divisors (146561644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91666836 is a wasteful number, since it uses less digits than its factorization.

91666836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2053 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 91666836 is about 9574.2799207042. The cubic root of 91666836 is about 450.8901491379.

The spelling of 91666836 in words is "ninety-one million, six hundred sixty-six thousand, eight hundred thirty-six".